package com.baselibrary.utils;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout.LayoutParams;

import java.lang.reflect.Method;


public class SystemBarTintManager {
static {
        // Android allows a system property to override the presence of the navigation bar.
        // Used by the emulator.
        // See https://github.com/android/platform_frameworks_base/blob/master/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java#L1076
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        try {
        Class c = Class.forName("android.os.SystemProperties");
        Method m = c.getDeclaredMethod("get", String.class);
        m.setAccessible(true);
        sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");
        } catch (Throwable e) {
        sNavBarOverride = null;
        }
        }
        }


/**
 * The default system bar tint color value.
 */
public static final int DEFAULT_TINT_COLOR = 0x99000000;

private static String sNavBarOverride;

private final SystemBarConfig mConfig;
private boolean mStatusBarAvailable;
private boolean mNavBarAvailable;
private boolean mStatusBarTintEnabled;
private boolean mNavBarTintEnabled;
private View mStatusBarTintView;
private View mNavBarTintView;

/**
 * Constructor. Call this in the host activity onCreate method after its
 * content view has been set. You should always create new instances when
 * the host activity is recreated.
 *
 * @param activity The host activity.
 */
@TargetApi(19)
public SystemBarTintManager(Activity activity) {

        Window win = activity.getWindow();
        ViewGroup decorViewGroup = (ViewGroup) win.getDecorView();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        // check theme attrs
        int[] attrs = {android.R.attr.windowTranslucentStatus,
        android.R.attr.windowTranslucentNavigation};
        TypedArray a = activity.obtainStyledAttributes(attrs);
        try {
        mStatusBarAvailable = a.getBoolean(0, false);
        mNavBarAvailable = a.getBoolean(1, false);
        } finally {
        a.recycle();
        }

        // check window flags
        WindowManager.LayoutParams winParams = win.getAttributes();
        int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
        if ((winParams.flags & bits) != 0) {
        mStatusBarAvailable = true;
        }
        bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
        if ((winParams.flags & bits) != 0) {
        mNavBarAvailable = true;
        }
        }

        mConfig = new SystemBarConfig(activity, mStatusBarAvailable, mNavBarAvailable);
        // device might not have virtual navigation keys
        if (!mConfig.hasNavigtionBar()) {
        mNavBarAvailable = false;
        }

        if (mStatusBarAvailable) {
        setupStatusBarView(activity, decorViewGroup);
        }
        if (mNavBarAvailable) {
        setupNavBarView(activity, decorViewGroup);
        }

        }

/**
 * Enable tinting of the system status bar.
 *
 * If the platform is running Jelly Bean or earlier, or translucent system
 * UI modes have not been enabled in either the theme or via window flags,
 * then this method does nothing.
 *
 * @param enabled True to enable tinting, false to disable it (default).
 */
public void setStatusBarTintEnabled(boolean enabled) {
        mStatusBarTintEnabled = enabled;
        if (mStatusBarAvailable) {
        mStatusBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
        }
        }

/**
 * Enable tinting of the system navigation bar.
 *
 * If the platform does not have soft navigation keys, is running Jelly Bean
 * or earlier, or translucent system UI modes have not been enabled in either
 * the theme or via window flags, then this method does nothing.
 *
 * @param enabled True to enable tinting, false to disable it (default).
 */
public void setNavigationBarTintEnabled(boolean enabled) {
        mNavBarTintEnabled = enabled;
        if (mNavBarAvailable) {
        mNavBarTintView.setVisibility(enabled ? View.VISIBLE : View.GONE);
        }
        }

/**
 * Apply the specified color tint to all system UI bars.
 *
 * @param color The color of the background tint.
 */
public void setTintColor(int color) {
        setStatusBarTintColor(color);
        setNavigationBarTintColor(color);
        }

/**
 * Apply the specified drawable or color resource to all system UI bars.
 *
 * @param res The identifier of the resource.
 */
public void setTintResource(int res) {
        setStatusBarTintResource(res);
        setNavigationBarTintResource(res);
        }

/**
 * Apply the specified drawable to all system UI bars.
 *
 * @param drawable The drawable to use as the background, or null to remove it.
 */
public void setTintDrawable(Drawable drawable) {
        setStatusBarTintDrawable(drawable);
        setNavigationBarTintDrawable(drawable);
        }

/**
 * Apply the specified alpha to all system UI bars.
 *
 * @param alpha The alpha to use
 */
public void setTintAlpha(float alpha) {
        setStatusBarAlpha(alpha);
        setNavigationBarAlpha(alpha);
        }

/**
 * Apply the specified color tint to the system status bar.
 *
 * @param color The color of the background tint.
 */
public void setStatusBarTintColor(int color) {
        if (mStatusBarAvailable) {
        mStatusBarTintView.setBackgroundColor(color);
        }
        }

/**
 * Apply the specified drawable or color resource to the system status bar.
 *
 * @param res The identifier of the resource.
 */
public void setStatusBarTintResource(int res) {
        if (mStatusBarAvailable) {
        mStatusBarTintView.setBackgroundResource(res);
        }
        }

/**
 * Apply the specified drawable to the system status bar.
 *
 * @param drawable The drawable to use as the background, or null to remove it.
 */
@SuppressWarnings("deprecation")
public void setStatusBarTintDrawable(Drawable drawable) {
        if (mStatusBarAvailable) {
        mStatusBarTintView.setBackgroundDrawable(drawable);
        }
        }

/**
 * Apply the specified alpha to the system status bar.
 *
 * @param alpha The alpha to use
 */
@TargetApi(11)
public void setStatusBarAlpha(float alpha) {
        if (mStatusBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        mStatusBarTintView.setAlpha(alpha);
        }
        }

/**
 * Apply the specified color tint to the system navigation bar.
 *
 * @param color The color of the background tint.
 */
public void setNavigationBarTintColor(int color) {
        if (mNavBarAvailable) {
        mNavBarTintView.setBackgroundColor(color);
        }
        }

/**
 * Apply the specified drawable or color resource to the system navigation bar.
 *
 * @param res The identifier of the resource.
 */
public void setNavigationBarTintResource(int res) {
        if (mNavBarAvailable) {
        mNavBarTintView.setBackgroundResource(res);
        }
        }

/**
 * Apply the specified drawable to the system navigation bar.
 *
 * @param drawable The drawable to use as the background, or null to remove it.
 */
@SuppressWarnings("deprecation")
public void setNavigationBarTintDrawable(Drawable drawable) {
        if (mNavBarAvailable) {
        mNavBarTintView.setBackgroundDrawable(drawable);
        }
        }

/**
 * Apply the specified alpha to the system navigation bar.
 *
 * @param alpha The alpha to use
 */
@TargetApi(11)
public void setNavigationBarAlpha(float alpha) {
        if (mNavBarAvailable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        mNavBarTintView.setAlpha(alpha);
        }
        }

/**
 * Get the system bar configuration.
 *
 * @return The system bar configuration for the current device configuration.
 */
public SystemBarConfig getConfig() {
        return mConfig;
        }

/**
 * Is tinting enabled for the system status bar?
 *
 * @return True if enabled, False otherwise.
 */
public boolean isStatusBarTintEnabled() {
        return mStatusBarTintEnabled;
        }

/**
 * Is tinting enabled for the system navigation bar?
 *
 * @return True if enabled, False otherwise.
 */
public boolean isNavBarTintEnabled() {
        return mNavBarTintEnabled;
        }

private void setupStatusBarView(Context context, ViewGroup decorViewGroup) {
        mStatusBarTintView = new View(context);
        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getStatusBarHeight());
        params.gravity = Gravity.TOP;
        if (mNavBarAvailable && !mConfig.isNavigationAtBottom()) {
        params.rightMargin = mConfig.getNavigationBarWidth();
        }
        mStatusBarTintView.setLayoutParams(params);
        mStatusBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
        mStatusBarTintView.setVisibility(View.GONE);
        decorViewGroup.addView(mStatusBarTintView);
        }

private void setupNavBarView(Context context, ViewGroup decorViewGroup) {
        mNavBarTintView = new View(context);
        LayoutParams params;
        if (mConfig.isNavigationAtBottom()) {
        params = new LayoutParams(LayoutParams.MATCH_PARENT, mConfig.getNavigationBarHeight());
        params.gravity = Gravity.BOTTOM;
        } else {
        params = new LayoutParams(mConfig.getNavigationBarWidth(), LayoutParams.MATCH_PARENT);
        params.gravity = Gravity.RIGHT;
        }
        mNavBarTintView.setLayoutParams(params);
        mNavBarTintView.setBackgroundColor(DEFAULT_TINT_COLOR);
        mNavBarTintView.setVisibility(View.GONE);
        decorViewGroup.addView(mNavBarTintView);
        }

/**
 * Class which describes system bar sizing and other characteristics for the current
 * device configuration.
 *
 */
public static class SystemBarConfig {

    private static final String STATUS_BAR_HEIGHT_RES_NAME = "status_bar_height";
    private static final String NAV_BAR_HEIGHT_RES_NAME = "navigation_bar_height";
    private static final String NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME = "navigation_bar_height_landscape";
    private static final String NAV_BAR_WIDTH_RES_NAME = "navigation_bar_width";
    private static final String SHOW_NAV_BAR_RES_NAME = "config_showNavigationBar";

    private final boolean mTranslucentStatusBar;
    private final boolean mTranslucentNavBar;
    private final int mStatusBarHeight;
    private final int mActionBarHeight;
    private final boolean mHasNavigationBar;
    private final int mNavigationBarHeight;
    private final int mNavigationBarWidth;
    private final boolean mInPortrait;
    private final float mSmallestWidthDp;

    private SystemBarConfig(Activity activity, boolean translucentStatusBar, boolean traslucentNavBar) {
        Resources res = activity.getResources();
        mInPortrait = (res.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT);
        mSmallestWidthDp = getSmallestWidthDp(activity);
        mStatusBarHeight = getInternalDimensionSize(res, STATUS_BAR_HEIGHT_RES_NAME);
        mActionBarHeight = getActionBarHeight(activity);
        mNavigationBarHeight = getNavigationBarHeight(activity);
        mNavigationBarWidth = getNavigationBarWidth(activity);
        mHasNavigationBar = (mNavigationBarHeight > 0);
        mTranslucentStatusBar = translucentStatusBar;
        mTranslucentNavBar = traslucentNavBar;
    }

    @TargetApi(14)
    private int getActionBarHeight(Context context) {
        int result = 0;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            TypedValue tv = new TypedValue();
            context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true);
            result = TypedValue.complexToDimensionPixelSize(tv.data, context.getResources().getDisplayMetrics());
        }
        return result;
    }

    @TargetApi(14)
    private int getNavigationBarHeight(Context context) {
        Resources res = context.getResources();
        int result = 0;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            if (hasNavBar(context)) {
                String key;
                if (mInPortrait) {
                    key = NAV_BAR_HEIGHT_RES_NAME;
                } else {
                    key = NAV_BAR_HEIGHT_LANDSCAPE_RES_NAME;
                }
                return getInternalDimensionSize(res, key);
            }
        }
        return result;
    }

    @TargetApi(14)
    private int getNavigationBarWidth(Context context) {
        Resources res = context.getResources();
        int result = 0;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            if (hasNavBar(context)) {
                return getInternalDimensionSize(res, NAV_BAR_WIDTH_RES_NAME);
            }
        }
        return result;
    }

    @TargetApi(14)
    private boolean hasNavBar(Context context) {
        Resources res = context.getResources();
        int resourceId = res.getIdentifier(SHOW_NAV_BAR_RES_NAME, "bool", "android");
        if (resourceId != 0) {
            boolean hasNav = res.getBoolean(resourceId);
            // check override flag (ic_see static block)
            if ("1".equals(sNavBarOverride)) {
                hasNav = false;
            } else if ("0".equals(sNavBarOverride)) {
                hasNav = true;
            }
            return hasNav;
        } else { // fallback
            return !ViewConfiguration.get(context).hasPermanentMenuKey();
        }
    }

    private int getInternalDimensionSize(Resources res, String key) {
        int result = 0;
        int resourceId = res.getIdentifier(key, "dimen", "android");
        if (resourceId > 0) {
            result = res.getDimensionPixelSize(resourceId);
        }
        return result;
    }

    @SuppressLint("NewApi")
    private float getSmallestWidthDp(Activity activity) {
        DisplayMetrics metrics = new DisplayMetrics();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            activity.getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
        } else {
            activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        }
        float widthDp = metrics.widthPixels / metrics.density;
        float heightDp = metrics.heightPixels / metrics.density;
        return Math.min(widthDp, heightDp);
    }

    /**
     * Should a navigation bar appear at the bottom of the screen in the current
     * device configuration? A navigation bar may appear on the right side of
     * the screen in certain configurations.
     *
     * @return True if navigation should appear at the bottom of the screen, False otherwise.
     */
    public boolean isNavigationAtBottom() {
        return (mSmallestWidthDp >= 600 || mInPortrait);
    }

    /**
     * Get the height of the system status bar.
     *
     * @return The height of the status bar (in pixels).
     */
    public int getStatusBarHeight() {
        return mStatusBarHeight;
    }

    /**
     * Get the height of the action bar.
     *
     * @return The height of the action bar (in pixels).
     */
    public int getActionBarHeight() {
        return mActionBarHeight;
    }

    /**
     * Does this device have a system navigation bar?
     *
     * @return True if this device uses soft key navigation, False otherwise.
     */
    public boolean hasNavigtionBar() {
        return mHasNavigationBar;
    }

    /**
     * Get the height of the system navigation bar.
     *
     * @return The height of the navigation bar (in pixels). If the device does not have
     * soft navigation keys, this will always return 0.
     */
    public int getNavigationBarHeight() {
        return mNavigationBarHeight;
    }

    /**
     * Get the width of the system navigation bar when it is placed vertically on the screen.
     *
     * @return The width of the navigation bar (in pixels). If the device does not have
     * soft navigation keys, this will always return 0.
     */
    public int getNavigationBarWidth() {
        return mNavigationBarWidth;
    }

    /**
     * Get the layout inset for any system UI that appears at the top of the screen.
     *
     * @param withActionBar True to include the height of the action bar, False otherwise.
     * @return The layout inset (in pixels).
     */
    public int getPixelInsetTop(boolean withActionBar) {
        return (mTranslucentStatusBar ? mStatusBarHeight : 0) + (withActionBar ? mActionBarHeight : 0);
    }

    /**
     * Get the layout inset for any system UI that appears at the bottom of the screen.
     *
     * @return The layout inset (in pixels).
     */
    public int getPixelInsetBottom() {
        if (mTranslucentNavBar && isNavigationAtBottom()) {
            return mNavigationBarHeight;
        } else {
            return 0;
        }
    }

    /**
     * Get the layout inset for any system UI that appears at the right of the screen.
     *
     * @return The layout inset (in pixels).
     */
    public int getPixelInsetRight() {
        if (mTranslucentNavBar && !isNavigationAtBottom()) {
            return mNavigationBarWidth;
        } else {
            return 0;
        }
    }

}

}